Penguin Books Limited is a British publishing house. It was co-founded in 1935 by Allen Lane with his brothers Richard and John, as a line of the publishers The Bodley Head, only becoming a separate company the following year. Penguin revolutionised publishing in the 1930s through its inexpensive paperbacks, sold through Woolworths and other stores for sixpence, bringing high-quality fiction and non-fiction to the mass market. Its success showed that large audiences existed for serious books. It also affected modern British popular culture significantly through its books concerning politics, the arts, and science.

Sir Allen Lane was a British publisher who together with his brothers Richard and John Lane founded Penguin Books in 1935, bringing high-quality paperback fiction and non-fiction to the mass market.